Safety locking device for machinery.



1.1. MARTY.

SAFETY LOCKING DEViCE FOR MACHINERY.

-APPLICATION FILED NOV. 17. 1916- Patented Dec. 18, 191?.

Josnr r-J. MARTY, or BOSTON, mnssecr-rusnrrs;

' SAFETY LOCKING DEVICE-FOR MACHINERY.

Specification of Letters Patent. Patente- IDec, 18, 191 1 7 Application filetl' Nove noer 17, 1916. Serial No 131,974.,

To all whom it may concern:

Be it known that I, JOSEPH J. MAnrY, a

citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Safety Locking Devices for Machinery, of which the following is a specification.

My invention relates to means for affording protection against injury to operators-of-machines which are constructed so that there is an element of danger to persons working at or nearthe same. The object of my invention is to provide improved means of this sort and particularly to provide means especially adapted to centrifugal extractors, such as arev usedin laundries. I

An-example of. a machine requiringprotective means of this sort is to be found in a centrifugal extractor such as is used in a laundry to remove water from; clothes. This machine comprises a vat or receptacle for holding thelclothes within which is arranged a rotating member that is driven at a very high rate of speed. In inserting and removing the clothes the operator of the machine frequently has occasion to put his hand or arm down into the receptacle and, while the machine is provided with a belt shipper and the operator can use the same to stop the machine before reaching into the receptacle, it frequently happens that he does not do so and as a result is seriously injured by the rapidly rotating member.

My invention aims to obviate such objectionable features of centrifugal extractors and to provide an improved extractor so constructed that the risk and possibility of injury from the rotating member is practicallv eliminated.

The invention consists in a protective mechanism for machinery embodying the peculiar features of construction and operation set forth in the following description and particularly pointed out and defined in the claims at the close thereof. and in an improved extractor for laundries embodying said means.

In the accompanying drawings Figure 1 is an elevation of the upper portion of a laundry extractor embodying the invention.

Fig. 2 is a similarview but sho-wingathe parts'in'other positions.

c Fig. 3 is a partial plan view. Having, reference. to the drawings, a represents the receptacle of an extractor for laundriesjb the rotating member arranged within receptacle a, and 0 the main drive shaft of the machine. I

The shaft 0 has a pulley supported in a horizontal position, while.

p d fast thereon alongside of whichis arrangeda loose pulthe machine is running, by' a shoulder. men

said shipper bar. The forward endjof shipper bar-h is also madevwith an integral downwardlyextending arm i the pur'pose of which will appear later.

Shaft c has a pulley a fiXed'to it; which acts througlnabelto and other devic es, not shown in the drawings, to rotatemember b at a high rate of speed, and as will be clear the operator can at any time while the ma chine is running, grasp handle Z and operate shipper bar it to stop or start the rotation of said member.

The clothes to be treated are inserted in the receptacle, or removed therefrom, at the top of the latter.

In a machine of the type herein shown the top of the member 6 comes to within a very small distance of the inturned flange at the top of the receptacle a and on account of this nearness, and of the fact that the member I) gyrates as well as rotates, operators of machines of this kind frequently have their hands injured by being crushed between the flange and the moving member I). To prevent this I provide the machine with a guard p herein shown as a door or lid large enough to cover the upper open end of receptacle a, and when said lid is in its closed position the interior of the receptacle is inaccessible and the lid closes in the member 6. The lid 79, which may be constructed mainly of open wire fabric as shown so that the top of the receptacle is open to the air as usual, is pivoted at g to the body of receptacle a. To the top of lid p is secured a metal plate 1" disposed opposite the extension arm h and handle Z, one end of said plate being made with a hook r.

\Vhen the lid 39 occupies its closed position and shipper rod h is drawn forward to start the machine, the arm 71. comes into position immediately above the plate 1 as shown in Fig. 1 and locks the lid p in its closed position so that said lid cannot be raised until the shipper rod h is shoved rearward to stop the machine and unlock guard lid p. hen the lid is thus unlocked the latter may be swung upward into its open position as shown in Fig. 2, and during this opening movement of the lid the plate 1' strikes handle Z and causes the free end of the latter to slide upward along plate 7 until the latter strikes against the arm h which arrests further opening movement of the lid and supports the guard lid in its open position.

v By having the handle Z pivotally connected with the end of shipper bark so as to fold aside in an upward direction as the lid is opened, economy of space is secured and at the same time the handle Z is within easy reach from the front of the machine when the lid is closed.

\Vith the parts in the positions shown in Fig. 2 the machine is started by first pulling shipper bar it forward shifting the belt from the loose pulley to the fast pulley and simultaneously locking the lid closed.

WVhat I claim is 1. In a centrifugal extractor, the combination of a receptacle, a hinged lid therefor, a driving shaft extending in a direction radial to the receptacle, a fast and a loose pulley on said shaft, a belt cooperating with said pulleys, a belt shipper slidable in a direction parallel to the shaft, and a clownwardly-directecl locking arm rigid with said belt shipper and adapted to engage the lid when the belt is on the fast pulley thereby locking the lid closed, said arm being carried out of engagement with and thereby unlocking the lid when the belt shipper is actuated to carry the belt onto the loose pulley.

2. A centrifugal extractor such as specified in claim 1, in combination with a handle pivoted to the inner end of the belt shipper, and a hook member on the lid situated to engage the handle when the lid is open and swing said handle into a vertical position, said hook member operating also to return the handle to its operative horizontal position when the lid is closed.

In testimony whereof I have affixed my signature, in presence of two witnesses.

JOSEPH J. MARTY. Witnesses:

JAMES'D. MCQUAID, ARTHUR F. RANDALL.

Copies of this patent may be obtained for five cents each; by addressing the "Commissioner of Patents.

Washington, D. 0. 

